9DBV0441AKILF - 1.8V PCIe Gen1-3 4-Ch Clock Buffer | Renesas
料号： 9DBV0441AKILF ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.45 | $44.50 |
| 100 | $3.85 | $385.00 |
| 500 | $3.45 | $1,725.00 |
| 1,000 | $3.1 | $3,100.00 |
| 3,000 | $2.75 | $8,250.00 |
9DBV0441AKILF 概述
A zero-delay buffer (ZDB) is a type of clock buffer IC that maintains the timing relationship between input and output clocks using an internal phase-locked loop (PLL). ZDBs sit in the clock distribution hierarchy between the platform clock generator (e.g., CK410/CK505) and endpoint devices, regenerating and fanning out low-jitter clocks to multiple loads while preserving input-to-output delay within tens of picoseconds. As a member of the SOC-Friendly 1.8 V VLP PCIe family, this part is specifically positioned for power-sensitive SoC platforms where 1.8 V supply rails are already present.
Key differentiating specifications include four HCSL outputs with integrated 100 ohm terminations (eliminating external Rs at each output), software-selectable 100 MHz/125 MHz operation, pin/software-selectable PLL bypass for minimum jitter mode, and per-output programmable slew rate for tuning across varied line lengths. The 32-VFQFPN (5x5) package with exposed pad provides a low thermal resistance path suited to the part's very-low-power consumption profile.
The architecture uses an internal PLL with programmable loop filter, allowing the designer to choose between high-bandwidth tracking of the reference (best for jitter attenuation of upstream noise) and low-bandwidth (best for low-frequency jitter transfer to outputs). HCSL outputs are PCIe-compliant and meet all PCIe Gen1-Gen3 base specification jitter masks. Differential input accepts common clock sources including those compliant with CK410/CK505 or PCIe reference clocks. Power is delivered through a single 1.8 V rail, simplifying motherboard layout and BOM.
Typical applications include server and workstation PCIe slot clock distribution, embedded computing platforms with PCIe endpoints, networking switches and routers with 1GbE/10GbE PHYs, storage controllers (SAS/SATA/NVMe), and industrial PCIe expansion cards. The combination of very-low-power operation, small package, and integrated terminations makes the part especially attractive for space-constrained SoC designs.
Designers should pay attention to the reference clock input routing (maintain 100 ohm differential impedance), per-output amplitude/slew programming via SMBus, and thermal pad soldering for the 32-VFQFPN exposed pad. Verify the PLL bandwidth setting matches the jitter profile required by downstream endpoints.
This page synthesizes distributor pricing, drop-in Renesas/PCB-compatible alternatives, and practical design notes not found in the standalone manufacturer datasheet.
直接替换替代料： 9DBV0441AKILF ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： 9DBV0441AKILF （相同外形与封装尺寸） ——差异在于 Number of Outputs, Output Type, Package, Product Type.
快速对比工具——选择替代料号进行并排对比：
9DBV0441AKLFT
✅ 直接替换📋 参考替代料（不在目录中）
9DBV0441AKILFT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
9DBV0441AKLF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
9DBV0441BKLFT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
9DBV0431AKILFT
✅ 直接替换📋 参考替代料（不在目录中）
9DBV0531AKILF
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
SI53112-A00AGM
✅ 直接替换✓ 有现货
$3.76 / 个
查看数据手册 →SI8442AB-C-IS
✅ 直接替换✓ 有现货
$1.05 / 个
查看数据手册 →9DBV0441AKILF 规格参数
| Device Type | Clock Buffer / Zero-Delay Buffer (ZDB) / Fanout Buffer |
| 功能 | PCIe Gen1-2-3 and 125 MHz Ethernet clock distribution |
| 输出数量 | 4 |
| 输出类型 | HCSL (PCIe Gen1-2-3 compliant) with integrated 100 ohm terminations |
| Input Type | HCSL-compatible differential (common clock) |
| Output Frequency (PCIe mode) | 100 MHz |
| Output Frequency (Ethernet mode) | 125 MHz (software selectable) |
| Supply Voltage (VDD) | 1.8 V |
| PLL | Internal, pin/software selectable bandwidth and PLL bypass |
| Programmable Slew Rate | Yes, per output |
| Programmable Output Amplitude | Yes, per output |
| Integrated Output Termination | Zo = 100 ohm |
| 封装 | 32-VFQFPN Exposed Pad, 5x5 mm |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) |
| RoHS | Compliant (Lead-Free) |
9DBV0441AKILF 引脚配置
| 引脚 1 | VDD — 1.8V power supply |
| 引脚 2 | GND — Ground |
| 引脚 3 | CLK_IN_P — Differential clock input (positive) |
| 引脚 4 | CLK_IN_N — Differential clock input (negative) |
| 引脚 5 | VDD — 1.8V power supply |
| 引脚 6 | GND — Ground |
| 引脚 7 | OUT0_P — HCSL output 0 positive (with 100 ohm termination) |
| 引脚 8 | OUT0_N — HCSL output 0 negative (with 100 ohm termination) |
| 引脚 9 | OUT1_P — HCSL output 1 positive (with 100 ohm termination) |
| 引脚 10 | OUT1_N — HCSL output 1 negative (with 100 ohm termination) |
| 引脚 11 | VDD — 1.8V power supply |
| 引脚 12 | GND — Ground |
| 引脚 13 | OUT2_P — HCSL output 2 positive (with 100 ohm termination) |
| 引脚 14 | OUT2_N — HCSL output 2 negative (with 100 ohm termination) |
| 引脚 15 | OUT3_P — HCSL output 3 positive (with 100 ohm termination) |
| 引脚 16 | OUT3_N — HCSL output 3 negative (with 100 ohm termination) |
| 引脚 17 | VDD — 1.8V power supply |
| 引脚 18 | GND — Ground |
| 引脚 19 | SDA — SMBus serial data |
| 引脚 20 | SCL — SMBus serial clock |
| 引脚 21 | ADDR — SMBus address select |
| 引脚 22 | PLL_BW — PLL bandwidth select / PLL bypass |
| 引脚 23 | FREQ_SEL — Frequency select (100/125 MHz) |
| 引脚 24 | OE — Output enable |
| 引脚 25 | NC — Not connected (per datasheet) |
| 引脚 26 | NC — Not connected (per datasheet) |
| 引脚 27 | GND — Ground |
| 引脚 28 | VDD — 1.8V power supply |
| 引脚 29 | NC — Not connected (per datasheet) |
| 引脚 30 | NC — Not connected (per datasheet) |
| 引脚 31 | RESERVED — Reserved - tie to GND per datasheet |
| 引脚 32 | RESERVED — Reserved - tie to GND per datasheet |
典型应用
9DBV0441AKILF 适用于 6 应用s: Server PCIe Slot Clock Distribution, 1GbE Ethernet Switch Clock Distribution, Storage Controller (NVMe/SAS) Clock Fanout, Industrial Embedded PCIe Platform, Embedded Computing SOM Clock Buffer, Test Equipment PCIe Backplane.
Server PCIe Slot Clock Distribution
The 9DBV0441AKILF fans out a 100 MHz PCIe reference clock to multiple PCIe slots on server and workstation motherboards. Its 1.8 V supply aligns with SOC-Friendly SoC platforms, while integrated 100 ohm HCSL terminations eliminate external Rs and reduce BOM. The four HCSL outputs meet PCIe Gen1-3 base spec jitter requirements, ensuring downstream root complexes and endpoints receive clean 100 MHz clocks. Per-output programmable slew rate lets designers tune each lane for its specific trace length, reducing EMI and improving signal integrity across long server board runs.
推荐
1GbE Ethernet Switch Clock Distribution
When software-selected to 125 MHz mode, the 9DBV0441AKILF provides reference clocks to GbE PHY transceivers in managed switches and routers. The very-low-power 1.8 V operation fits switch ASIC power budgets, while integrated 100 ohm HCSL terminations preserve signal integrity over switch board traces. Pin-selectable PLL bandwidth allows the clock phase noise to be tuned for the specific PHY jitter tolerance. Four outputs cover multiple PHY ports per buffer, lowering component count versus discrete oscillator-and-buffer designs in dense networking hardware.
推荐
Storage Controller (NVMe/SAS) Clock Fanout
The 9DBV0441AKILF distributes low-jitter reference clocks to NVMe SSD controllers and SAS/SATA host bus adapters in storage subsystems. Its four HCSL outputs each drive an independent downstream device, simplifying clock tree design in dense storage backplanes. Per-output amplitude programming compensates for varying trace lengths on storage cards, while the integrated 100 ohm terminations eliminate the series resistors that would otherwise populate each output. The 1.8 V supply matches typical storage SoC rails, easing power sequencing.
推荐
Industrial Embedded PCIe Platform
Industrial PCs and edge-compute platforms use the 9DBV0441AKILF to fan out 100 MHz PCIe clocks to FPGAs, MPSoCs, and PCIe-to-PCI bridges in -40C to +85C operating environments. The industrial temperature grade supports harsh deployment scenarios, while the 32-VFQFPN 5x5 mm exposed-pad package provides robust thermal performance in sealed boxes. Software-controlled output amplitude and slew rate enable field tuning for varied backplane lengths across custom industrial form factors, giving system integrators flexibility without BOM changes.
推荐
Embedded Computing SOM Clock Buffer
System-on-Module designs use the 9DBV0441AKILF as a local PCIe clock buffer on the carrier board, regenerating clocks from the SoC clock generator to downstream PCIe peripherals. The 32-VFQFPN 5x5 mm package fits small PCB footprints typical of carrier boards, and the 1.8 V supply is already present on most modern SoM designs. Programmable PLL bypass mode minimizes phase jitter when the upstream SoC clock is already low-jitter, preserving signal margins for sensitive SerDes interfaces in COM Express and SMARC modules.
推荐
Test Equipment PCIe Backplane
ATE and validation chassis designers use the 9DBV0441AKILF to provide clean, multi-output reference clocks to PCIe test backplanes and protocol analyzer cards. The pin-selectable PLL bypass mode allows direct fanout of an external low-noise reference clock, minimizing added jitter in jitter-sensitive compliance test setups. Four HCSL outputs drive multiple DUT slots, while per-output amplitude programming accommodates varied test card impedances. The exposed-pad 32-VFQFPN package simplifies thermal management in densely populated test fixtures.
推荐
推荐产品汇总
工程参考数据： 9DBV0441AKILF ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 9DBV0441AKLFT | 9DBV0441AKILFT | 9DBV0431AKILFT | SI53112-A00AGM |
|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Silicon Labs |
| Package | 32-VFQFPN (5x5 mm) | 32-VFQFPN (5x5 mm) - same | 32-VFQFPN (5x5 mm) - same | 32-VFQFPN (5x5 mm) - same | 32-VFQFPN (5x5 mm) - same |
| Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| RoHS Compliance | Yes (Lead-Free) | Yes | Yes | Yes | Yes |
关键差异点
- Integrated 100 ohm HCSL terminations （对比 9DBV0431AKILFT)
- Dual-mode 100 MHz PCIe / 125 MHz Ethernet （对比 SI53112-A00AGM)
- Per-output programmable slew rate and amplitude （对比 9DBV0441AKLFT)
设计说明
Maintain 100 ohm differential impedance on the CLK_IN_P/CLK_IN_N input pair and on each of the four HCSL output pairs. Route the differential pairs with matched length (<5 mil mismatch within a pair) and keep traces short and direct to minimize reflections. The 32-VFQFPN exposed thermal pad MUST be soldered to a continuous ground plane with at least 9 thermal vias for proper heat dissipation and electrical grounding.
Decouple each VDD pin with a 0.1 uF ceramic capacitor placed as close to the pin as possible, plus a bulk 10 uF capacitor near the device. The 1.8 V rail must be low-noise (ripple <50 mVpp) - upstream LDOs (not switching regulators) are recommended to avoid coupling switching noise into the HCSL outputs. Place bulk caps at the regulator output to minimize transients during SMBus programming.
Use per-output programmable slew rate to tune each HCSL output for its specific trace length. Shorter traces benefit from lower slew rate (reduced EMI), while longer traces need higher slew to meet PCIe Gen3 rise/fall time requirements. Per-output amplitude programming allows compensating for cable losses in PCIe-over-cable applications. Always validate PCIe Gen3 compliance jitter (Pj, Rj) at the actual load after PCB layout.
Do NOT leave the PLL_BW pin floating - tie it high for PLL bypass (lowest jitter) or low for PLL operation per the Renesas 9DBV0441 datasheet. SMBus address pins (ADDR) MUST be tied to VDD or GND per the datasheet to select the correct slave address before first communication. Failing to solder the exposed pad causes the part to overheat and increases output jitter at high ambient temperatures.
合规信息
RoHS compliant and lead-free per Renesas product page. Not AEC-Q100 qualified - this is a commercial/industrial grade clock buffer. Industrial temperature grade -40C to +85C supported.
